Rotary snap-switch.



MKM

G. W.GOODRIDGE & G; B. THOMAS.

ROTARY SNAP SWITCH.

APPLICATION HLBD @11.3, 1908.

903,705. Patented lvm/.10,1908

ATTORNEYS UNITED srACrEsA PATENT OFFICE.

GILBERT W. GOODRIDGE AND GEORGE B. THOMAS, OF BRIDGEPORT, CONNEOTICUT,'

ASSIGNORS TO THE PERKINS ELECTRIC SWITCH MANUFACTURINGv COMPANY, 0FBRIDGEBORT, CONNECTICUT, AI CORPORATION 'OF CONNECTICUT.

ROTARY SNAP-salmon, I

lSpecification of VLetters Patent. i

Application filed January 3, 1908. .Serial N o; 409,202.

To all whom 'it may concern:

Be it known'that we, GILBERT W. GOOD RIDGE and GEORGE B. THOMAS, bothcitizens of the United States of America, and residents of Bridgeport;in the county of Faireld, inthe State .of Connecticut, have in- .of thespindle to be moved longitudinally of the latter-when the latter isturned against the strain of a spring and to be thereby lifted clear ofthe engaging teeth of the ratchet fixed on the base.

Our invention has been designed with the view of simplifying andimproving the construction of the operative parts of the switch, andparticularly the rotary switch member. In the accompany drawings Figurel is a perspective View, illustrating the several component parts of therotary ,switch member; Fig. 2 is a vertical section on theline 2 2, Fig.3; and Fig. 3 is a section on the line 8 3, Fig. 2.

Referring to Figs. 2 and?) A is the porcelain or other insulating basecarrying the usual Contact posts, not shown, and the fixed4 ratchetplate a, while B 'is the central spindle turning in a bearing in thebase and pro'- vided at .the opposite end with a suitable handle orbutton C, (partially4 shown),v by which it may be turned. This spindlehas coiled around it a spiral spring S, one end of which is connected tothe spindle at 8,Fig. 2, while the outer end bears upon an arm on therotary switch piece R, (Fig. 3).

The spindle has a screw thread cut on Itit at s1, and onthis isa nut Nwith a leg n passing freely through a hole inl the rotary switch toengage the teeth Of-the ratchet plate on the base, and to be raised earof the ra chet teeth by the rotationjof tite spindle, wliere- .piece R,Fig. 2, and adapted at its lowexl'fend Patented Nov? io,1eos.

upon the -tensioned spring will cause the f switch piece R to take thenext position with a snap. A

The construction of the .rotary switch piece will bebest understood byreference to Fig. 1. This piece is builtup. of sheet metal stampings and'insulation sheets secured together by means of an `eyelet or hollowrivet 5, through which the spindle l B passes. There isa central switchcontact blade, which may be of any well known type and made of one ormore leaves or plates. In the present instance it is shown as aone-piece plate 6 with upturned contact ends 7, 7 to make and breakcontact with thisplate is an opening lled with a sheet 8 of paper orother suitable insulating material, and then around the whole of thecentral part of the plate 6 is folded orI the stationary contacts onthebase, and in wrapped an insulating sheet- 9. Under the plate thusenveloped is placed a flanged plate 10, and over it a plate 11 and theseveral plates and sheets being formed. with suitable openings as shownfor the passage vof the leg n of the nut N and also for' the receptionof the eyelet 5, the latter is inserted and riveted over, (F ig.. 2), tofirmly clamp these sheets yand plates together in such a way that thecentral contact-carrying switch plate 6' willl be insulated by thedescribed 'sheets from the-top and bottom plates and from the eyelet andtherefore' from the spindle B. v

The upper insulated part 11 is shown as provided with upwardly extendingarms 12 l having prongs 13to be passed through openings in and to beclamped down on the indicating dial 14, Fig. 3.- .This dial does notneed to be insulated from the arms 12 because the plate 11 is'ne'ver' inthe electrical circuit.

We claim as our invention 1. A rotary switch piece for a snap switch,consisting of a central blade with Contact ends punched to receive aninsulating central piece, insulation enveloping the central plate, topand bottom plates, and means for securing these parts together.

2. A rotary switch piece for a snap switch, consisting of a centralbladewith Contact ends punchedto receive an insulatlng center piece,msulation enveloping the central plate,

vtop and bottom plates and an eyelet riveting the parts together andConstituting a beati 3. A rotar switch, consisting of a central blade'with Contact ends,

ng fior the operating spindle. y s Witch piece for a sna top and bottomplates and intermediate insulating sheets5 the insulated top platehaving arms and an indicating dial clamped thereon.

In testimony-whereof we have signed our 10 narines to thisspecification, 1n the presence of two subscriblng Wltnesses.

GILBERT W. GOODRIDGE. GEORGE B. THOMAS. Witnesses:

F. E. SEELEY,

C. D. PLATT.

